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Verified answer
A = √(c² - b²)a = √(17² - 8²)
a = √(289 - 64)
a = √225
a = 15 (tinggi segitiga)
Luas segitiga
= 1/2 x a x t
= 1/2 x 8 x 15
= 4 x 15
= 60 cm²
a = √(c² - b²)
a = √(15² - (20-11)²)
a = √(225 - 81)
a = √144
a = 12 (tinggi trapesium)
Luas trapesium
= 1/2 x (s atas + s bwh) x t
= 1/2 x (20 m + 11 cm) x 12 cm
= 6 cm x 31 cm
= 186 cm²
Luas seluruh
= 60 cm² + 186 cm²
= 246 cm² (d)
Verified answer
Pelajaran :MatematikaKelas :6
Bab :4
Nama Bab :Luas dan Volume
Kode mapel:2
Kode :6.2.4
Jawab:
tinggi trapesium=√((√(17cm)²-(8cm)²)²-(20cm-11cm)²)
=√((289cm²-64cm²)-(9cm)²) //√225=t seg//
=√(225cm²-81cm²)
=√144cm²
=12cm
L bangun=L trapesium+L seg
=(a+b)t/2+a×t/2
=((11cm)+(20cm))(12cm)/2+(8cm)(15cm)/2
=31cm(6cm)+15cm(4cm)
=186cm²+60cm²
=246cm²